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© Semiconductor Components Industries, LLC, 2006
February, 2006 − Rev. 2
1 Publication Order Number:
NCP1406/D
NCP1406
25 V/25 mA PFM Step−Up
DC−DC Converter
The NCP1406 is a monolithic PFM step−up DC−DC converter.
This device is designed to boost single Lithium or two cells AA/AAA
battery voltage up to 25 V (with internal MOSFET) output for
handheld applications. A pullup Chip Enable feature is built−in with
this device to extend battery−operating life. In addition to standard
boost converter topologies, this device can be configured for
voltage−inverting and step−down applications. This device is
available in space−saving TSOP−5 package. With its small footprint,
the device is also ideal for generating a boosted voltage from a 3.3 V
or 5.0 V power rail.
Features
• 85% Efficiency at V
OUT
= 25 V, I
OUT
= 25 mA, V
IN
= 5.0 V
• Low Operating Current of 15 mA (Not Switching)
• Low Shutdown Current of 0.3 mA
• Low Startup Voltage of 1.8 V Typical at 0 mA
• Output Voltage up to 25 V with Built−in 26 V MOSFET Switch
• PFM Switching Frequency up to 1.0 MHz
• Chip Enable
• Output Voltage Soft−Start
• Feedback Pin Open/Short Circuit Protection
• Input Undervoltage Lockout
• Thermal Shutdown
• Low Profile and Minimum External Parts
• Micro Miniature TSOP−5 Package
• Pb−Free Package is Available
Typical Applications
• LCD Bias
• White LED Driver
• OLED Driver
• Personal Digital Assistants (PDA)
• Digital Still Camera
• Cellular Telephone
• Hand−Held Games
• Hand−Held Instrument
TSOP−5/SOT23−5/SC59−5
SN SUFFIX
CASE 483
PIN CONNECTIONS
Device Package Shipping†
ORDERING INFORMATION
NCP1406SNT1 TSOP−5 3000 Tape & Ree
l
1
2
3
4
http://onsemi.com
DAM = Device Marking
A = Assembly Location
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
MARKING
DIAGRAM
VDD
5
GND
1
5
1
5
DAMAYWG
G
FB
CE
LX
(Top View)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
NCP1406SNT1G TSOP−5
(Pb−Free)
3000 Tape & Ree
l
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